A Computer Algebra System (CAS) is a software program designed to perform symbolic mathematics. Unlike standard calculators that handle numerical calculations, a CAS can manipulate mathematical expressions in symbolic form, allowing users to simplify, factor, or expand equations. This capability is useful in various fields, including engineering, physics, and computer science. CAS tools can solve algebraic equations, perform calculus operations, and even generate plots of functions. Popular examples of CAS include Mathematica, Maple, and SageMath. These systems help students and professionals alike to explore complex mathematical concepts more easily and efficiently.